ci: migrate to buildkit

.forgejo/workflows/publish.yaml

@@ -13,7 +13,7 @@ concurrency:
 jobs:
   publish: 
     if: github.repository == 'teidesu/tei.su' # do not run on forks
-    runs-on: docker-dind
+    runs-on: buildkit
     permissions:
       contents: write
       packages: write
@@ -24,16 +24,10 @@ jobs:
       - name: Prepare
         env: 
           DONATE_PAGE_DATA: ${{ vars.DONATE_PAGE_DATA }}
-        run: |
-            echo "$DONATE_PAGE_DATA" > src/components/pages/PageDonate/data.json
-            /opt/start-dockerd.sh
+        run: echo "$DONATE_PAGE_DATA" > src/components/pages/PageDonate/data.json
 
       - name: Login to GitHub Container Registry
-        uses: docker/login-action@v3
-        with:
-          registry: git.stupid.fish
-          username: ${{ github.actor }}
-          password: ${{ secrets.PACKAGES_PAT }}
+        run: /opt/registry-login.sh git.stupid.fish "${{ github.actor }}" "${{ secrets.PACKAGES_PAT }}"
       
       - name: Docker meta
         id: meta
@@ -42,14 +36,15 @@ jobs:
           images: git.stupid.fish/teidesu/tei.su
           tags: type=sha
           flavor: latest=true
+          sep-tags: ',name='
       - name: Build and push
-        uses: docker/build-push-action@v5
-        with:
-          context: .
-          push: true
-          platforms: linux/amd64
-          tags: ${{ steps.meta.outputs.tags }}
-          labels: ${{ steps.meta.outputs.labels }}
+        run: |
+          buildctl build \
+            --frontend dockerfile.v0 \
+            --local context=. \
+            --local dockerfile=. \
+            --opt platform=amd64 \
+            --output type=image,oci-mediatypes=true,compression=zstd,rewrite-timestamp=true,push=true,name=${{ steps.meta.outputs.tags }}
 
   deploy:
     runs-on: node22